LM3643YFFR - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

LM3643YFFR
Manufacturer

TI
ChipWorker Part#

CW5653917
Category

LED Driver, LED Display Driver
Package

UFBGA-12
Description

Dual LED Flash Driver Capable of up to 1.5A 12-DSBGA -40℃ to 85℃
Documentation

Datasheet

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LM3643YFFR Specifications

Attribute	Attribute Value

Part Number	LM3643YFFR
Manufacturer	TI
ChipWorker Part#	CW5653917
Category	LED Driver, LED Display Driver
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	12 Pin
Case/Package	UFBGA-12
Frequency	2MHz,4MHz
Number of Outputs	2 Output
Number of Channels	2 Channel
Quiescent Current	300 µA
Switching Frequency	4000 kHz
Input Voltage (DC Max)	5.5 V
Input Voltage (DC Min)	2.5 v
Output Current (Max)	1.5 A
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
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Operating Temperature	-40℃ ~ 85℃ (TA)
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
ECCN Code	EAR99
HK STC License	NLR

Product Description

The LM3643 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The LM3643 utilizes a 2-MHz or 4-MHz fixed-frequency synchronous boost converter to provide power to the dual 1.5-A constant current LED sources. The total LED current the LM3643 boost can deliver is 1.5 A (ILED1 \\+ ILED2 ). The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2 with each driver capable of delivering a maximum of 1.5 A (ex: ILED1 = 1.5 A and ILED2 = 0FF, ILED1 = 0FF and ILED2 = 1.5 A, or a current configuration with a current less than 1.5 A , ILED1 = 950 mA and ILED2 = 250 mA). An adaptive regulation method ensures the current sources remain in regulation and maximizes efficiency.
Features of the LM3643 are controlled via an I2C-compatible interface. These features include: hardware flash and hardware torch pins (STROBE and TORCH/TEMP), a TX interrupt, and an NTC thermistor monitor. The device offers independently programmable currents in each output leg to drive the LEDs in a Flash or Movie Mode (Torch) condition.
The 2-MHz or 4-MHz switching frequency options, overvoltage protection (OVP), and adjustable current limit allow for the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device operates over a –40°C to 85°C ambient temperature range.

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